Nut-lock.



N. STOFFEL & J. HAMILTON.

NUT LOCK. APPLICATION FILED JULY l0. I9I5.

Patented Apr. 25,1916.

2 SHEETS-SHEET I.

31mm om Stm@ t Wfl/tunnels N. STOFFEL-L J. HAMILTON.

NUT LOCK. APPucAUoN rflLEn 1uLY10. 1915.

Patented 25, 1916.

NICHOLAS STOFFEL .AND JESS HAMILTO, OF WELLSVILLE, OHIO.

NUT-LOCK.

Specification of Letters Patent.

Patented Apr. 25, 1916.

Application filed July 10, 1915. Serial No. 39,176.

To all whom t may concern Be it known that we, NioiioLAs Sronrni, andJnss HAMILTON, citizens of the United States, residing at Wellsville, inthe county of Columbiana and State of Ohio, have invented new and usefulImprovements in Nut-Locks, of which the following is a specication.

The present invention relates to improvements in means for locking a nutupon a bolt, and the object of the invention is to provide a nut with alongitudinal groove which communicates with its bore, to arrange withinthe groove a removable key and to provide the bolt with a key seat whichis adapted to receive the key when the nut is screwed home upon thebolt.

With the above and other objects in view, the improvement resides in theconstruction, combination and arrangement of parts set forth in thefollowing specication and falling within the'scope of the appendedclaims.

In the drawings: Figure l is a longitudinal sectional view taken througha nut and bolt constructed in accordance with and provided with ourinvention, Fig. 2 is a transverse sectional View approximately on theline 2-2 of Fig. 1, Fig. 3 is a perspective view of the bolt, lFig. 4 isa perspective view of the nut, Fig. 5 is a perspective view of the key,Fig. 6 is a perspective view of the split washer, and Fig. 7 is atransverse sectional view illustrating a nut.

In the drawings, the numeral. l designates a bolt of the ordinaryconstruction, the same, however, having its threaded shank provided withan elongated slot 2 providing what we shall term a key seat.

Threaded upon the bolt 1 is a nut 3 which is also of the ordinaryconstruction. The nut 3, however', has a longitudinal groove 4 whichcommunicates with its threaded bore and has its sides formed withoppositely disposed parallel slots 5 coininunicating with the groove 4.

Arranged within the groove 4 and having its arms disposed within theslots 5 is substantially U-shaped key 6, the arms of the key beingprovided with transverse notches 7, the said notches serving as meansfor elevating the key to retain the same within the groove 4 and theslot 5 and out of the key seat 2. When the bolt has been fully screwedupon the nut and abuts with plates 8 through which the said bolt passes,the

key 6 will drop by gravity within the key seat 2 and thus retain the nutand bolt effectively locked.

The width of the vertical arms of the key 6 are slightly less than thewidth of the slots 5 so that pressure must `be exerted to force the keywithin the seat 2. Arranged upon the bolt and upon the outer plate 8 isa split spring washer 10, the said washer having its ends spread and oneof the said arms or split ends of the washer is adapted to contact withthe inner arm of the key 6 to retain the said key in position in the keyseat.

If desired and as illustrated in Fig. 7 the arms ll of the substantiallyU-shaped key 6 are wedge-shaped, as are also the opposite walls providedby the slot 5, and by such an arrangement an eXtra amount of force mustbe exerted upon the ends of the arms to force the same out of contactwith the walls of the slot 5 and into engagement with the key slot.

From the above description, taken in connection with the accompanyingdrawings, the simplicity of the device, as well as the advantagesthereof will, it is thought, be perfectly apparent to those skilled inthe art to which such invention appeitains without further detaileddescription.

Having thus described the invention, what we claim is:

l. In a means for locking a nut upon a bolt, a bolt having its shankformedwith longitudinally extending depression providing a. key seat, anut threaded upon the bolt and having a longitudinal groovecommunieating with its bore, the sides of the nut having a slot whichcommunicates with the groove, a key member seated in the groove andhaving an angular end disposed adjacent the slot in the side of the nut,and a member loosely arranged upon the shank of the bolt and adapted,when the nut is screwed home upon the bolt, to contact with the angulararm of the key to force the same in the slot in the side of the nut.

2. In a means for locking a nut upon a bolt, the combination with asuperstructure and a `bolt passing through the same, the said bolt li:ving its threaded shank provided with an elongated depression forming akey seat, a nut screwed upon the bolt, said nut having a longitudinalgroove which communicates with its bore, the sides of the nut havingslots which communicate with the groove, a kelincluding a body memberseated in the groove and having angular' arms received in the slots andcontacting with the opposite Walls thereof, a split spring Washerarranged upon the bolt and contacting With the superstructure, the endsof the Washer -being split lin opposite directions, and adapted toengage with oneof the arms of the key When the said key isforoed uponthe nut to Within the seat of the'bolt. u

3. In a means for securing `a nut upon a bolt, the combination with abolt having its threaded shank provided With an. elongated depressionproviding a key lseat, a nut threaded upon the bolt, said nut having alongitudinal groove Which communicates With its rbore and havingitssides provided p With slots Which communicatev with the Copies ofslots of the groove, the opposite Walls of the slots being angular, akey, said key including a member y, arranged Within` .the g groove andhaving anthe opposite edges of which beand being arranged Within thenut, said arms having transverse notches, and the said arms adaptedgular arms, ing beveled under the pressure of force to be moved in theslots to have their connecting member move upon the nut to `Withink thekey seat of ythebolt. I

Intestimony ywhereof We affix tour signatures in presenceoftyvo`Witnesses.

NICHOLAS .STOFFEL JESS HAMILTON. 'c Witnesses:

A. Gr.l MACKENZIE, JAY FLOYD MoDoLE this'patentvmay be obtained for rvecents each,A by addressing the" Commissioner of Patenti,

f f Washing-ton, ID. C.

